Jun
30.
Here is my weekly weather quiz question for the last time. “What are “Sastrugi?” Here is the correct answer. Sastrugi are ridges of snow formed on a snow field by the action of the wind.
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An Upper Level High Pressure Ridge (“Arch” shape) strengthens again over us bringing more sunshine and heat. The graphics for days 1-3 show a weak cold front pushing through Tuesday. The graphics for days 3-7 Wednesday through Sunday show a frontal system sliding into the Pacific Northwest next Sunday.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 29 in the Good category measuring Ozone.
Oakridge: The Air Quality Index is 7 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 9 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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ADVISORIES:
- AN EXCESSIVE HEAT WATCH IS IN EFFECT FROM THURSDAY MORNING THROUGH SATURDAY EVENING FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, JACKSON COUNTY, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
HEALTH ADVISORIES:
- A PERMANENT HEALTH ADVISORY REMAINS IN EFFECT FOR THE SOUTH UMPQUA RIVER BAR. POOLS IN THE BEDROCK ALONG THE RIVERS EDGE ARE KNOWN TO DEVELOP BLUE-GREEN ALGAE (CYANOBACTERIAL) BLOOMS THAT CAN BE HARMFUL TO PETS AND PEOPLE IF ACCIDENTAL INGESTION OCCURS. SIGNS HAVE BEEN POSTED ALONG SEVERAL ACCESS AREAS ALONG THE RIVER.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Mostly clear this evening, partly cloudy late tonight,
- Mostly sunny and a bit cooler Monday, mostly clear Monday night,
- Sunny and a bit cooler Tuesday, clear at night,
- Sunny and a bit warmer Wednesday, then clear at night.
- lows 55-48 warming to 52 Wednesday night highs 82-80 warming to 84 Wednesday.
- Sunny and a bit warmer Thursday (Independence Day), clear Thursday night,
- Sunny and a bit warmer Friday and Saturday, clear both nights,
- Then sunny and a bit cooler Sunday.
- highs 92-98 cooling to 95 Sunday lows 56-58 cooling to 95 Sunday (seasonal averages high 80 low 50)
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EUGENE-SPRINGFIELD POLLEN COUNT:
GRASS: HIGH (33)
TREES: LOW (5)
WEEDS: LOW (3)
Measured 6.30.24
Data courtesy of Oregon Allergy Associates.
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Forecast for the Umpqua Valley including Roseburg:
- Mostly clear this evening, partly cloudy with patchy fog late tonight,
- Some AM clouds, sunny Monday, mostly clear Monday night,
- Sunny Tuesday, clear at night,
- Sunny and a bit warmer Wednesday, then clear Wednesday night.
- lows 59-53 warming to 56 Wednesday night highs 85-84 warming to 87 Wednesday.
- Sunny and a bit warmer Thursday (Independence Day), clear Thursday night,
- Sunny and a bit warmer Friday, clear at night,
- Then sunny Saturday and Sunday, clear Saturday night,
- highs 96-101 cooling to 98 Sunday lows near 62. (seasonal average high 82 low 55)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy with patchy early evening coastal fog and mostly cloudy with patchy late evening coastal fog while mostly cloudy with patchy late evening inland fog lasting through late tonight,
- Some AM clouds with patchy coastal fog while areas of inland AM fog, sunny and a bit warmer Monday afternoon, partly cloudy Monday night,
- Mostly sunny and a bit cooler Tuesday, mostly clear at night,
- Mostly sunny and a bit warmer Wednesday, then mostly clear Wednesday night.
- lows 54-50 warming to 52 Wednesday night highs 72-70 warming back to 72 Wednesday.
- Sunny and a bit warmer Thursday (Independence Day), mostly clear Thursday night,
- Mostly sunny and a bit warmer Friday, mostly clear at night,
- Mostly sunny and a bit cooler Saturday, mostly clear Saturday night,
- Then sunny and a bit cooler Sunday.
- highs 76-78 cooling to 74 Sunday lows 55-53. (seasonal average high 65 low 53)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly clear this evening, partly cloudy late tonight,
- Sunny and a bit cooler Monday, mostly clear Monday night,
- Then sunny and a bit warmer Tuesday and Wednesday, clear both nights.
- free air freezing level 12,000 ft. rising to 13,000 ft. late tonight, 12,000 ft. rising to 13,000 ft. Monday afternoon, 14,000 ft. rising to 15,000 ft. Monday night, 15,000 ft. Tuesday, then 16,000 ft. Tuesday night through Wednesday night.
- lows 44-42 warming to 48 Wednesday night highs 66-76.
- Sunny and a bit warmer Thursday (Independence Day), clear Thursday night,
- Sunny and a bit warmer Friday, mostly clear at night,
- Sunny and a bit warmer Saturday, clear Saturday night,
- Then sunny and a bit cooler Sunday.
- free air freezing level 16,000 ft. Thursday, then above 16,000 ft. Thursday night through Sunday.
- highs 83-87 cooling to 84 Sunday lows 52-55.
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